Claude Opus 4.8 vs Nemotron 3 Ultra 550B A55B
Wins 5 of 7 areas
Coding · Agents · Reasoning · Facts · Math
Wins 2 of 7 areas
Long documents · Following instructions
Claude Opus 4.8 is the stronger all-rounder.Nemotron 3 Ultra 550B A55B is cheaper and better at following instructions.
Scores updated · 40 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software80Claude Opus 4.88 of 8 tests
- AgentsCarrying out multi-step tasks on its own50Claude Opus 4.85 of 5 tests
- ReasoningHard problems that need careful thinking50Claude Opus 4.85 of 5 tests
- MathCompetition and research-level math31Claude Opus 4.83 of 4 tests
- FactsGetting facts right instead of making them up21Claude Opus 4.82 of 3 tests
- Following instructionsDoing exactly what it is asked02Nemotron 3 Ultra 550B A55B2 of 2 tests
- Long documentsFinding answers in very long texts01Nemotron 3 Ultra 550B A55B1 of 1 test
Long documents rests on a single test.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Nemotron 3 Ultra 550B A55B costs 90% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Opus 4.8 pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+39.9points ahead
- Multi-step tasks using many real software toolsMCP Atlas+37.5points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+30.7points ahead
Where Nemotron 3 Ultra 550B A55B pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+19.2points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+9.6points ahead
- Olympiad math problems with short answersIMOAnswerBench+8.8points ahead
Every test, side by side
All 40 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 4.8
- Terminal-Bench 2.1Claude Opus 4.8 by 30.784.653.9+30.7
- Terminal-Bench HardClaude Opus 4.8 by 21.958.336.4+21.9
- SWE-bench ProClaude Opus 4.8 by 19.569.249.7+19.5
- SWE-bench VerifiedClaude Opus 4.8 by 17.988.670.7+17.9
- SWE-bench MultilingualClaude Opus 4.8 by 16.784.467.7+16.7
- SciCodeClaude Opus 4.8 by 14.154.440.3+14.1
- LiveBench · Agentic CodingClaude Opus 4.8 by 11.850.538.7+11.8
- LiveBench · CodingClaude Opus 4.8 by 11.181.870.7+11.1
AgentsClaude Opus 4.8
- BrowseCompClaude Opus 4.8 by 39.984.344.4+39.9
- MCP AtlasClaude Opus 4.8 by 37.582.244.7+37.5
- GDPValClaude Opus 4.8 by 2247.725.7+22
- Terminal-Bench 4.0Claude Opus 4.8 by 21.221.70.5+21.2
- τ-Bench V3 · BankingClaude Opus 4.8 by 2034.214.2+20
ReasoningClaude Opus 4.8
- SimpleBenchClaude Opus 4.8 by 23.164.841.7+23.1
- Humanity's Last ExamClaude Opus 4.8 by 20.348.728.4+20.3
- CritPtClaude Opus 4.8 by 17.820.93.1+17.8
- LiveBench · ReasoningClaude Opus 4.8 by 14.589.274.7+14.5
- GPQA DiamondClaude Opus 4.8 by 5.39286.7+5.3
FactsClaude Opus 4.8
- AA-Omniscience · AccuracyClaude Opus 4.8 by 26.248.822.6+26.2
- SimpleQA VerifiedClaude Opus 4.8 by 20.65332.4+20.6
- AA-Omniscience · Non-hallucinationNemotron 3 Ultra 550B A55B by 9.660.770.3+9.6
MathClaude Opus 4.8
- HMMT Feb. 2026Claude Opus 4.8 by 16.795.578.8+16.7
- IMOAnswerBenchNemotron 3 Ultra 550B A55B by 8.883.592.3+8.8
- AIME 2026Claude Opus 4.8 by 5.810094.2+5.8
- LiveBench · MathematicsClaude Opus 4.8 by 5.694.388.7+5.6
Long documentsNemotron 3 Ultra 550B A55B
- AA-LCRNemotron 3 Ultra 550B A55B by 1.677.779.3+1.6
Following instructionsNemotron 3 Ultra 550B A55B
- IFBenchNemotron 3 Ultra 550B A55B by 19.262.281.4+19.2
- LiveBench · Instruction FollowingNemotron 3 Ultra 550B A55B by 1.57273.5+1.5
Other results12 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- Toolathlon VerifiedClaude Opus 4.8 by 45.679.934.3+45.6
- GDPval-AA v2Claude Opus 4.8 by 445 rating points15931148+445 rating
- AA-OmniscienceClaude Opus 4.8 by 29.228.8-0.4+29.2
- Artificial Analysis Coding IndexClaude Opus 4.8 by 2574.349.3+25
- AA Agentic IndexClaude Opus 4.8 by 20.942.621.7+20.9
- HLE (with tools)Claude Opus 4.8 by 20.557.937.4+20.5
- AA IntelligenceClaude Opus 4.8 by 18.941.822.9+18.9
- Finance Agent v2Claude Opus 4.8 by 16.453.937.5+16.4
- livebench_data_analysisClaude Opus 4.8 by 11.56654.5+11.5
- τ²-Bench Telecom (AA run)Claude Opus 4.8 by 11.194.483.3+11.1
- livebench_languageClaude Opus 4.8 by 8.979.770.8+8.9
- Finance Agenttie53.953.7tie
Questions people ask
Which is better, Claude Opus 4.8 or Nemotron 3 Ultra 550B A55B?
Claude Opus 4.8 wins five of the seven areas where both have results: coding, agents, reasoning, facts and math. Nemotron 3 Ultra 550B A55B wins long documents and following instructions, and costs 90% less.
Which is better for coding?
Claude Opus 4.8. It wins 8 of the 8 coding tests both models report; Nemotron 3 Ultra 550B A55B wins none.
Which is cheaper?
Claude Opus 4.8 costs $5.00 per million input tokens and $25.00 per million output tokens; Nemotron 3 Ultra 550B A55B costs $0.60 and $2.50. That makes Nemotron 3 Ultra 550B A55B about 90% cheaper for the same work.
How do you compare the two?
We use the 40 benchmark tests both models have published scores on. The verdict counts the 28 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 12 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.